Trinet Network Technology

General

The Trinet network is almost entirely based on Ethernet
technology, excluding the AYY offices at Töölö and Arabia campuses
which are currently implemented with DSL connections. The Trinet
backbone and Internet connections were upgraded to 10 Gbps during
2009 and 2010. The remaining part of the network uses 1-10 Gbps
links for switch-to-switch connections. When the ongoing 1 Gbps
access connectivity upgrade goes further, all switch links will be
upgraded either to 10 Gbps (non-protected core access) or to 10+10 Gbps
(protected core access).

Routers

Trinet has two Cisco Catalyst 6500 Sup720-3BXL series routers,
which provide IPv4 and IPv6 routing for the whole network and
backbone connectivity for the 1 Gbps edge switch links. Both routers
have their own 10 Gbps Funet connection, and routers themselves have
been linked with 20 Gbps. The first 10 Gbps connection to the Funet
Espoo router is a normal 10 GbE optical link. The second 10 Gbps
connection to the Funet Helsinki router is carried over the Funet
optical network.

The theoretical total forwarding capacity for the each Trinet
router, with the current configuration, is around 78 Mpps ie. 53
Gbps for IPv4 and 39 Mpps ie. 27 Gbps for IPv6 with a minimum
Ethernet frame size.

Current sites and edge switches

The Trinet network base on switches from multiple generations,
with the oldest originating from the late 1990s. Especially the
older switches do not allow all modern services and protections to
be used, most prominently IPv6 multicast. Please refer to the
following table if you are interested in the current situation in
the apartment buildings or in the AYY offices.

Location

Switches

User Access

Towards Backbone

MTU

DHCP Filtering

RA/DHCPv6 Filtering

IPv4 Multicast

IPv6 Multicast

1 Gbps Schedule

AYY

Jämeräntaival 1

2 * Cisco Catalyst 4506-E

1 Gbps

20+20 Gbps

9000

X

X

X

X

AYY

Jämeräntaival 3

1 * Juniper EX6210

1 Gbps

10+10 Gbps

9000

X

X

X

AYY

Jämeräntaival 5

1 * Juniper EX6210

1 Gbps

10+10 Gbps

9000

X

X

X

AYY

Jämeräntaival 6

1 * Juniper EX6210

1 Gbps

10+10 Gbps

9000

X

X

X

AYY

Jämeräntaival 7 A

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

AYY

Jämeräntaival 7 B

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

AYY

Jämeräntaival 7 C

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

HOAS

Jämeräntaival 9

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

HOAS

Jämeräntaival 10 A-B

1 * HP ProCurve 2650

100 Mbps

1 Gbps

1500

X

X

TBD

HOAS

Jämeräntaival 10 C-D

1 * HP ProCurve 2650

100 Mbps

1 Gbps

1500

X

X

TBD

HOAS

Jämeräntaival 10 E-F

1 * HP ProCurve 2650

100 Mbps

1 Gbps

1500

X

X

TBD

HOAS

Jämeräntaival 10 G

1 * HP ProCurve 2650

100 Mbps

1 Gbps

1500

X

X

H1 / 2018

HOAS

Jämeräntaival 10 H

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

HOAS

Jämeräntaival 11 A-B

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

HOAS

Jämeräntaival 11 C-D

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

HOAS

Jämeräntaival 11 E-I

5 * HP ProCurve 2650

100 Mbps

1 Gbps

1500

X

X

3-8 / 2018

HOAS

Jämeräntaival 11 J-M

4 * HP ProCurve 2650

100 Mbps

1 Gbps

1500

X

X

9-12 / 2018

AYY

Otakaari 18 A

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

AYY

Otakaari 18 B-C

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

AYY

Otakaari 20

1 * HP ProCurve 5406R

1 Gbps

10+10 Gbps

9000

X

X

X

X

AYY

Otaranta 8 A

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

AYY

Otaranta 8 B

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

AYY

Otaranta 8 C

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

AYY

Otaranta 8 D

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

AYY

Otaranta 8 E

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

AYY

Servinkuja 1

1 * HP ProCurve 5412zl

1 Gbps

10+10 Gbps

9000

X

X

X

X

OAS

Servinkuja 2 A-C

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

OAS

Servinkuja 2 D-F

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

HOAS

Servinkuja 5 A

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

HOAS

Servinkuja 5 B

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

HOAS

Servinkuja 6

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

OAS

Servin Maijan tie 1

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

HOAS

Servin Maijan tie 3

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

AYY

Servin Maijan tie 6 A-C

1 * Juniper EX4200

1 Gbps

10+10 Gbps

9000

X

X

X

AYY

Servin Maijan tie 6 D-G

1 * Cisco Catalyst 4506-E

1 Gbps

10+10 Gbps

9000

X

X

X

X

AYY

Servin Maijan tie 10

1 * Juniper EX6210

1 Gbps

10+10 Gbps

9000

X

X

X

AYY

Servin Maijan tie 12 A-F

1 * Juniper EX6210

1 Gbps

10+10 Gbps

9000

X

X

X

AYY

Servin Maijan tie 12 G-K

1 * Juniper EX6210

1 Gbps

10+10 Gbps

9000

X

X

X

AYY

Atlantinkatu 7

2 * Cisco Catalyst 4506-E

1 Gbps

10 Gbps

9000

X

X

X

X

AYY

Haarniskatie 8

2 * Cisco Catalyst 4506-E

1 Gbps

10 Gbps

9000

X

X

X

X

AYY

Kaj Franckin katu 4

1 * Cisco Catalyst 4506-E

1 Gbps

10 Gbps

9000

X

X

X

X

AYY

Rummunlyöjänkatu 1

1 * Cisco Catalyst 4506-E

1 Gbps

10 Gbps

9000

X

X

X

X

AYY

Rummunlyöjänkatu 3

1 * Cisco Catalyst 4506-E

1 Gbps

10 Gbps

9000

X

X

X

X

AYY

Vaasankatu 10

1 * Cisco Catalyst 4506-E

1 Gbps

10 Gbps

9000

X

X

X

X

Rantasauna

1 * Cisco Catalyst 4506-E

1 Gbps

10 Gbps

9000

X

X

X

X

Servin Mökki

1 * HP ProCurve 2920-48G

1 Gbps

10 Gbps

9000

X

X

X

X

TF Otakaari 22

1 * Juniper EX4200

1 Gbps

10+10 Gbps

9000

X

X

X

TF Otakaari 22

1 * HP ProCurve 2626

100 Mbps

1 Gbps

1500

X

X

TF Otakaari 22

3 * HP ProCurve 2650

100 Mbps

1 Gbps

1500

X

X

AYY Otakaari 11

4 * HP ProCurve 2910al

1 Gbps

10 Gbps

9000

X

X

X

X

Future sites

The following sites are planned to be connected to the Trinet network in the near future.

Location

Switches

User Access

Towards Backbone

MTU

DHCP Filtering

RA/DHCPv6 Filtering

IPv4 Multicast

IPv6 Multicast

Schedule

AYY

Arkadiankatu 28

1 * Cisco Catalyst 4506-E

1 Gbps

10 Gbps

9000

X

X

X

X

H1 / 2018

AYY

Kirkonkyläntie 16

1 * Cisco Catalyst 4506-E

1 Gbps

10 Gbps

9000

X

X

X

X

H1 / 2018

AYY

Kääpiöidenpolku 4

1 * Cisco Catalyst 4506-E

1 Gbps

10 Gbps

9000

X

X

X

X

H1 / 2018

AYY

Mäyrätie 1

1 * Cisco Catalyst 4506-E

1 Gbps

10 Gbps

9000

X

X

X

X

H1 / 2018

AYY

Pohjavedenkatu 4

1 * Cisco Catalyst 4506-E

1 Gbps

10 Gbps

9000

X

X

X

X

H1 / 2018

AYY

Ruusulankatu 5

1 * Cisco Catalyst 4506-E

1 Gbps

10 Gbps

9000

X

X

X

X

H1 / 2018

AYY

Tuhkimontie 2

1 * Cisco Catalyst 4506-E

1 Gbps

10 Gbps

9000

X

X

X

X

H1 / 2018

AYY

Turkismiehentie 8

1 * Cisco Catalyst 4506-E

1 Gbps

10 Gbps

9000

X

X

X

X

H1 / 2018

Unicast and Multicast Routing

Border Gateway Protocol (BGP) is in use for both IPv4
unicast/multicast and IPv6 unicast/multicast routing. To decrease
Internet connectivity convergation delay in case of a link failure,
Bidirectional Forwarding Detection (BFD) is utilized with IPv4 BGP
to detect a link failure on a sub-second time scale. Internal
Gateway Protocols (IGP), namely, Open Shortest Path First (OSPF) and
OSPFv3, are in place to establish connectivity between the Trinet
routers by advertising the loopbacks and the link networks. The
second important task for the IGP routes is to provide BGP next-hop
reachability. Otherwise BGP carries all external and internal route
information.

Both Funet uplinks are normally in use as the same BGP metric is
used in the both links. The model is called "hot-potato" aka
closest-exit routing. Trinet subnetworks have been divided between
the routers to allow better load balancing on the uplinks and to
provide more than 10 Gbps usable bandwidth to the Internet.

Customer Access

Trinet utilizes Hot Standby Router Protocol (HSRP) on the
direction of the customer networks. Internet Group Management
Protocol (IGMP) and Multicast Listener Discovery (MLD) is used with
IPv4 and IPv6 multicast, respectively. However, IPv6 multicast is
enabled only within the switches offering 1 Gbps user access
connectivity. In addition, the new 1 Gbps switches enable use of
jumbo frames ie. packets with Maximum Transfer Unit (MTU) up to 9000
bytes. The Trinet backbone, Funet links and a majority of AYY
services also support jumbo frames, and the support will be extended
to the remaining services in the future.